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/*
Copyright 2021 mtei
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// clang-format off
#if defined(MATRIX_EXTENSION_74HC157)
# define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb
# define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb)
# define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC157
#elif defined(MATRIX_EXTENSION_74HC153)
# define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb, MCU_GPIOc, MCU_GPIOd
# define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb || (dev)==MCU_GPIOc || (dev)==MCU_GPIOd)
# define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC153
#endif
static const pin_t sel_pins[] = { MATRIX_EXT_74HC15x };
#ifdef MATRIX_GPIO_NEED_SEPARATE_ATOMIC
# define setMatrixInputHigh(dev, port, bit) \
do { \
if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
setPortBitInputHigh_atomic(port, bit); \
}
} while(0)
#else
# define setMatrixInputHigh(dev, port, bit) \
do { \
if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
setPortBitInputHigh(port, bit); \
} \
} while(0)
#endif
LOCAL_FUNC ALWAYS_INLINE void select74HC15x(uint8_t devid);
LOCAL_FUNC
void select74HC15x(uint8_t devid) {
writePin(sel_pins[0], devid&1);
#if defined(MATRIX_EXTENSION_74HC153)
writePin(sel_pins[1], devid&2);
#endif
}
LOCAL_FUNC ALWAYS_INLINE port_width_t readPortMultiplexer(uint8_t devid, pin_t port);
LOCAL_FUNC port_width_t readPortMultiplexer(uint8_t devid, pin_t port) {
select74HC15x(devid);
waitInputPinDelay();
return readPort(port);
}
#define readMatrixPort(dev, port) \
((dev) == MCU_GPIO)? readPort(port): (IS_74HC15x(dev))? readPortMultiplexer((dev)-MCU_GPIOa, port):0
#define INIT_74HC15X(x) setPinOutput(x); writePinLow(x);
LOCAL_FUNC
void init_74hc15x(void) {
MAP(INIT_74HC15X, MATRIX_EXT_74HC15x)
}
#define init_extension() init_74hc15x()
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